If your encrypted volume is /dev/sda2, you would enable the service with this command:

# systemctl enable truecrypt@dev-sda2.service

Note: Although it works, this service should stil be considered experimental, there might be better solutions to use truecrypt with systemd. If you use mpd or any other programme that needs to access the encrypted filesystem, put it into the line starting with Before=. Cheers to dgbaley27 for basically writing this! Improvements welcome!

Note: This way of doing it (specifically the use of tty-force) is not recommended according to this thread, which suggests an alternative approach similar to that taken for LUKS.

Note: Gleaned from bpont on the forums. If you use mpd and have your music dir in ~, uncomment Before=mpd.service, which takes care that mpd is started after this script. If you also use truecrypt-unmount.service (see next service) uncomment the Requires=truecrypt-unmount.service and Also=truecrypt-unmount.service so it gets installed and activated by systemd automatically when using this script.

Note: I don't know if this works yet. It may be necessary to replace TimeoutSec=5 with ExecStart=sleep 5. If you use mpd, make sure to uncomment Before=mpd.service to make sure this service is executed after mpd is closed down (different order during the shutdown of processes than during start up!). Script gleaned from tladuke on the forums.

MPD Socket Activation

If the following mpd.socket file is enabled while mpd.service (provided by mpd) is disabled, systemd will not start mpd immediately, but it will listen on the appropriate sockets. When an mpd client attempts to connect on one of those sockets, systemd will start mpd.service and transparently hand over control of those ports to the mpd process.

If you prefer to listen on different UNIX sockets or network ports (even multiple sockets of each type), or if you prefer not to listen on network ports at all, you should add/edit/remove the appropriate "ListenStream=" lines in the [Socket] section of mpd.socket AND modify the appropriate lines /etc/mpd.conf (see "man 5 mpd.conf" for more details).

If you use different (even multiple) network or local sockets, or prefer not to use network sockets at all, simply add, change, or remove lines beginning with "ListenStream=" in the [Socket] section.